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Message-ID: <2119103466.1250629874846.JavaMail.jira@brutus>
Date: Tue, 18 Aug 2009 14:11:14 -0700 (PDT)
From: "Tim Smith (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-1821) Weight.scorer() not passed doc
 offset for "sub reader"
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    [ https://issues.apache.org/jira/browse/LUCENE-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12744718#action_12744718 ] 

Tim Smith commented on LUCENE-1821:
-----------------------------------

I have a really crazy cache that for performance and memory reasons has to be based on the Multi-Reader (and this is very important in my application)

looking closer at the per segment searching, i cannot upgrade to 2.9 (which i really want to do) because of this

> Weight.scorer() not passed doc offset for "sub reader"
> ------------------------------------------------------
>
>                 Key: LUCENE-1821
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1821
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Search
>    Affects Versions: 2.9
>            Reporter: Tim Smith
>
> Now that searching is done on a per segment basis, there is no way for a Scorer to know the "actual" doc id for the document's it matches (only the relative doc offset into the segment)
> If using caches in your scorer that are based on the "entire" index (all segments), there is now no way to index into them properly from inside a Scorer because the scorer is not passed the needed offset to calculate the "real" docid
> suggest having Weight.scorer() method also take a integer for the doc offset
> Abstract Weight class should have a constructor that takes this offset as well as a method to get the offset
> All Weights that have "sub" weights must pass this offset down to created "sub" weights

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